Required and Voluntary Movements

The ability to move is important for comfort. Movement reduces static loads and increases blood circulation. There is a difference between required and voluntary movement (Ankrum and Nemeth, 1995).

Required movement is movement that a task requires us to do, such as having to shift the head between the screen and printed materials. Voluntary movements are postural changes that are allowed, but not required by the task. We want to minimize required movements, but we want to encourage voluntary movements.

Neck Posture with Nova

Nova's monitor placement allows a wide range of voluntary neck postures with a minimum of postural and visual discomfort.

With Nova's lower monitor position, you can hold your head erect and direct your eyes downward. When that posture becomes tiring (as eventually it will), you can bend your neck downward in a wide range of comfortable neck postures. These temporary changes of neck posture can relieve neck strain with little or no visual discomfort.

In guidelines for workplace and machine control layout, Chaffin (1991) considered a head inclination of 20 to 30 degrees as normal.